How to service and repair the spark plugs for engine ignition systems in 5.4L and 6.8L engines on Ford F-250 Super Duty?

Service spark plugs in 5.4L and 6.8L engines, loosen ignition coil-on-plug and blow out debris using compressed air. It is all right to reuse original plugs in the same cylinder, new plugs may be used anywhere. Installation Tighten new plugs to 34 Nm (25 lb-ft) and check for gaps.

How to service the spark plugs for the engine ignition systems (RH and LH, 5.4L and 6.8L) on Ford F-250 Super Duty?

To remove debris use compressed air, remove the ignition coil-on-plug and service the engine spark plugs (5.4L and 6.8L). Re-use old plugs in same cylinder; any may be used. Close new plugs with 34 Nm (25 lb-ft) and check with no gaps.

OEM Ford F-250 Super Duty Spark Plug

Ignition Spark Plug

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8 Spark Plugs found

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Ford F-250 Super Duty Spark Plug Part Number: PZK-1F
$10.25 MSRP: $20.73
You Save: $10.48 (51%)
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Product Specifications
- Replaced by: PZK-1F-X
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Ford F-250 Super Duty | Harley-Davidson Edition, King Ranch, Lariat, XL, XLT | 10 Cyl 6.8 L GAS, 8 Cyl 5.4 L GAS
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Ford F-250 Super Duty Spark Plug Part Number: CYFS-12Y-T6
$5.39 MSRP: $8.35
You Save: $2.96 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: CYFS-12Y-T5, CYFS-12F-5X, SP-586, BR3Z-12405-A, CYFS-O92-FT, CYFS-12F-5, SP-520, SP-520-X
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2024 Ford F-250 Super Duty | King Ranch, Lariat, Platinum, XL, XLT | 8 Cyl 6.8 L FLEX, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
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Ford F-250 Super Duty Spark Plug Part Number: AGSF-22W-MX
$5.08 MSRP: $8.25
You Save: $3.17 (39%)
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Product Specifications
- Replaces: AGSF-22W-M, SP-479, AGSF-22W-
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1999-2007 Ford F-250 Super Duty | Harley-Davidson Edition, King Ranch, Lariat, XL, XLT | 10 Cyl 6.8 L GAS, 8 Cyl 5.4 L GAS
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Ford F-250 Super Duty Spark Plug Part Number: HJFS-24FP-X
$9.73 MSRP: $15.06
You Save: $5.33 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: SP-509, HJFS-24FP
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2010 Ford F-250 Super Duty | Cabela's, FX4, Harley-Davidson Edition, King Ranch, Lariat, XL, XLT | 10 Cyl 6.8 L GAS, 8 Cyl 5.4 L GAS
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Ford F-250 Super Duty Spark Plug Part Number: MC3Z-12A342-F
$13.74 MSRP: $21.82
You Save: $8.08 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Glow Plug; Diesel Glow Plug
- Replaces: ZD-11, F4TZ-12A342-A, F4TZ-12A342-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1999-2003 Ford F-250 Super Duty | Lariat, XL, XLT | 8 Cyl 7.3 L DIESEL
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Ford F-250 Super Duty Spark Plug Part Number: 4C3Z-12A342-A
$18.33 MSRP: $28.36
You Save: $10.03 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Glow Plug; Diesel Glow Plug
- Replaces: 4C3Z-12A342-AA, 4C3Z-12A342-A2, ZD-13-A2, ZD-13
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Ford F-250 Super Duty | Harley-Davidson Edition, King Ranch, Lariat, XL, XLT | 8 Cyl 6.0 L DIESEL
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Ford F-250 Super Duty Spark Plug Part Number: 3C3Z-12A342-A
$9.64 MSRP: $14.91
You Save: $5.27 (36%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Glow Plug; Diesel Glow Plug
- Replaces: ZD-12, 3C3Z-12A342-AA2, 3C3Z-12A342-AA, ZD-12-2
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2006 Ford F-250 Super Duty | Harley-Davidson Edition, King Ranch, Lariat, XL, XLT | 8 Cyl 6.0 L DIESEL
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Ford F-250 Super Duty Spark Plug Part Number: CYFS-12-FPX
$8.74 MSRP: $13.53
You Save: $4.79 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaces: SP-513, CYFS-092FP, CYFS-12-FP, SP-526
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2022 Ford F-250 Super Duty | King Ranch, Lariat, Platinum, XL, XLT | 8 Cyl 6.2 L FLEX

Ford F-250 Super Duty Spark Plug

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Ford F-250 Super Duty Spark Plug Parts and Q&A

Spark Plug
3C3Z-12A342-A
Q: How to service and repair the spark plugs for engine ignition systems in 5.4L and 6.8L engines on Ford F-250 Super Duty?
A: Service spark plugs in 5.4L and 6.8L engines, loosen ignition coil-on-plug and blow out debris using compressed air. It is all right to reuse original plugs in the same cylinder, new plugs may be used anywhere. Installation Tighten new plugs to 34 Nm (25 lb-ft) and check for gaps.
Spark Plug
PZK-1F
Q: How to service the spark plugs for the engine ignition systems (RH and LH, 5.4L and 6.8L) on Ford F-250 Super Duty?
A: To remove debris use compressed air, remove the ignition coil-on-plug and service the engine spark plugs (5.4L and 6.8L). Re-use old plugs in same cylinder; any may be used. Close new plugs with 34 Nm (25 lb-ft) and check with no gaps.